i've had 2, i had the 'ventile-ish' smock, in standard configuration, which is the best windproof i've ever used, but sadly got sold as though everyone says they are a generous cut that wasn't my experience.
i currently have a gaberdine smock, can't remember which modelt it is, but it has longer chest pockets that take an OS map, zipped map pockets behind those, a compass pocket on the front of one of the pockets, and velcro pockets on the back of the forearms for crawling pads.
i found them to be very well made, and materials to highest quality. next one i get will be a larger one, and will be the ventile type again but with my current smock's specs. if they respond to my emails next time.